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COURT REACHES DECISION IN PATENT LITIGATION

 HOLLAND, Mich., April 2 /PRNewswire/ -- The U.S. District Court in Grand Rapids, Mich., today issued a decision regarding the patent litigation between Donnelly Corporation (AMEX: DON) of Holland, and Gentex Corporation (NASDAQ-NMS: GNTX) of Zeeland, Mich., on Gentex's U.S. Patent No. 5,128,799 (the '799 patent). The Court found the Gentex patent valid and infringed, but refused to award the $30 million in damages requested by Gentex. Instead, the Court awarded Gentex only $2.2 million.
 This decision only affects Donnelly's older electrochromic mirror products. The '799 Gentex patent relates to a particular type of electrochromic mirror which uses a liquid material to dim the mirror to reduce glare and specific characteristics of that mirror, such as the range of reflectivity and the resistivity of the glass coatings used in the mirror.
 Following a two-week trial, the jury also provided an advisory opinion to Judge Benjamin Gibson that this patent is enforceable as the jury believes that Gentex did not intentionally withhold highly relevant "prior art" from the U.S. Patent Office. "Prior art" means that knowledge of the technology in question was known and available prior to the issuance of Gentex's patent. Judge Gibson will now consider the enforceability of this patent and is expected to make a final ruling on this issue during the month of April 1993.
 Donnelly Chairman and CEO Dwane Baumgardner stated:
 "Although we are disappointed with this decision and continue to believe this patent to be invalid, we are gratified that the jury has vindicated Donnelly of any willfulness relating to infringement issues. We are also hopeful that Judge Gibson will not follow the advisory opinion on enforceability and will ultimately rule that this patent is unenforceable.
 "The technology covered by this patent is an older form of electrochromic technology which has been superseded in the marketplace with newer, more advanced technologies such as the new INTELLIGENT VISION(TM) System which was announced by Donnelly on March 3, 1993. Initial reaction from the marketplace regarding this system has been very positive.
 "We are looking forward to resolving any remaining patent issues with Gentex in a timely manner and refocusing our full attention on developing our rapidly growing business."
 Donnelly Corporation offers several electrochromic technologies to the market involving the use of chemicals, solid film, and multiple thin films. The patent litigation between Donnelly and Gentex concerns one of the older chemically based electrochromic technologies. Donnelly has already disposed of another Gentex patent on the basis of Gentex having violated U.S. patent law by offering its product for sale more than one year before applying for its patent. Donnelly will now proceed to offer additional defenses on two other Gentex patents which were not completely disposed of in earlier trials.
 Donnelly is an international company dedicated to serving the world automotive industry with high-quality window systems, interior and exterior mirror systems, and interior trim and lighting systems. In addition, the company serves the computer and electronics industries with specialty coated glass products. The company operates from 20 locations throughout the world and was recently named as one of the "top 10" in the new book titled, "The 100 Best Companies to Work for in America."
 -0- 4/2/93
 /CONTACT: Maryam Komejan of Donnelly Corporation, 616-786-6022; or Randy Boileau, 313-393-3300, for Donnelly Corporation/
 (DON GNTX)


CO: Donnelly Corporation; Gentex Corporation ST: Michigan IN: AUT SU:

JG -- DE018 -- 2660 04/02/93 16:37 EST
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Date:Apr 2, 1993
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